It didn’t relent until hundreds of miles of the Central Valley turned into an inland sea, leaving the city of Sacramento ...

Ancient Mars is starting to look less like a scattered patchwork of dried-up valleys and more like a planet once ruled by continent-scale rivers. For the first time, scientists have traced giant ...

当“看不见”的药物决定你的健康午间休息，治疗药物监测（TDM）实验室的液相色谱串联质谱仪（LC-MS/MS）仍在嗡嗡作响，药师小杨盯着屏幕上跳动的数据曲线——这是一位肾移植患者的环孢素血药浓度报告。血药浓度已超出安全上限近20%。“立刻联系主治医生调整剂量！”她按下消息发送键，长舒一口气。